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HD 203857
HD 203857 is a late type K giant star in the constellation Cygnus, located nearly 920 light years away from the Sun. The star is thought to form a visual binary system with the F-type bright giant BDS 10966 A, though it's likely they are actually not gravitationally bound. The star likely hosts an extrasolar planet, though yet unconfirmed.
==Substellar companion==
Okayama Planet Search team has published a paper in late 2008 reporting investigations on radial velocity variations observed for a set of evolved stars, announcing possible detection of a substellar companion orbiting the giant star HD 203857. Orbital period is estimated 2.3 years, but planet has still to be confirmed.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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